![]() Industry-wide multifunction standards have been defined for the PC Card and PCI buses. If the device complies with the multifunction standards for its bus, your driver requirements are significantly reduced. The component responsible for each of these tasks depends on the multifunction standard for the device's parent bus, the extent to which the device conforms to the standard, and the capabilities of the parent bus driver. ![]() There must be INF files and drivers for each function. Resource requirements for each function must be communicated to the PnP manager. The resource requirements for one function cannot be expressed in terms of the resources of another function (for example, function1 uses I/O port x and function2 uses port x + 200).Įach function must be able to operate as a separate device, even if it is serviced by the same drivers as another function.Įach function on the device must be enumerated. The functions cannot have start-order dependencies. ![]() This means the functions must have the following characteristics: In a multifunction device, the individual functions are independent. Combination printer/scanner/fax devices and modem/network cards are common multifunction devices. A multifunction device occupies one location on its parent bus but contains more than one function.
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